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Siemens PANEL PC 877 User Manual

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Maintenance and service 
 
12.4 Installing and removing hardware components 
 
SIMATIC Panel PC 877 
12-10
 
Operating instructions, Release 07/2006, A5E00877780-01 
12.4.3 
Installing and removing memory modules 
Memory expansion 
The motherboard is equipped with 2 slots for memory modules. 184 pin DDR266 or PC2700 
memory modules can be used, unbuffered, no ECC. This enables you to expand the 
memory capacity of the device to a maximum of 2 GB. These slots can be fitted with one or 
two memory modules.  
 
Combination 
Slot X3 
Slot X4 
Maximum expansion 
1 
256/512 MB/1 GB 
 
1 GB 
2 
256/512 MB/1 GB 
256/512 MB/1 GB 
2 GB 
 
 
 
Note 
Any module can be plugged into any slot.  
 
Preparation 
Disconnect the device from mains and unplug all cables. 
 
 
Caution 
The electronic components on the PCBS are highly sensitive to electrostatic discharge. It is 
therefore vital to take precautionary measures when handling these components. Refer to 
the directives for handling electrostatic sensitive components. For more information, please 
refer to the section "ESD directives".